Irrigating apparatus.



D.. D. MGEARLY.

IRRIGATING APPRATUS.

APPLICATION HLED DBC. 2. 191s,

Patented Jan. 5,'1915.

2 SHEETS-SHEET 1.

D. D. MGEARLY.

IRRIGATING APPARATUS.

APPLICATION HLBD DBG. 2. 1913.

Patented Jan. 5, 1915.

2 SHEBTSSHEET 2.

STATES DOUGLAS D. MCEARLY, 0F CLNTON, MISSISSIPPI.

IRRIGATING APPARATUS.

Application filed December 2,1913.

n an overhead irrigating system embodying a novel construction ofdouble-acting pump for supplying a continuous stream of water to thesprayers or discharge nozzles.

Another object of the invention is to provide a pump of the characterdescribed which is simple of construction, reliable and eihcient inaction, which comprises few parts liable to get out of order, and whichhas an even irrigating pumping action.

The invention consists of the features of construction, combination andarrangement of parts herein fully described and claimed reference beinghad to the accompanying drawings in which Figure l is a side elevationshowing the application of the invention to an irrigating system, aportion of which is herein disclosed. Fig. 2 is a plan view thereof.Fig. 3 is a vertical transverse section on the line ,3*3 of Fig. 2. Fig.i is a vertical longitudinal section through the pump. Fig. 5 is ahorizontal section on the line 5"-5 of Fig. 4. Fig. 6 is a view of thedouble pump piston removed, with parts appearing in section. Fig. 7 is adetail section on the line 7-7 of Fig. 6. Fig. 8 is a view showing theconstruction of one ofthe check valves.

In the present disclosure, l` have shown the application of my inventionto an irrigating apparatus of the overhead type embodylng a maindistributing pipe l, a supply pipe 2 communicating therewith, and A.series of parallel delivery pipes 3 leading from the delivery pipe andprovided at intervals with dependingsprayers or discharge nozzles, thepipe being suitably supported from and at a desired elevation above theground or field to be irrigated. The pipe 2 is in communication with adoubleacting pump 5, by which, when the apparatus is in service, acontinual flow of water is supplied through the distributing anddelivery pipes to the discharge nozzles. This Specification of Letterslatent.

Patented J an. 5, 1915.

Serial No. 804,258.

pump is preferably composed mainly of piping and comprises a pair ofworking cylinders 5 and 6 arranged in longitudinal alinement 'andcoupled at their inner or proximate ends bv a bearing sleeve 7, providedwith an outlet nipple or pipe 8 communicating with the supply pipe 2,said sleeve being also provided with suitable bearings for a drive shaft9, which extends outwardly through a stufling box lO.

The outer ends of the cylinders 5 and 6 are connected by companionelbows ll and 'l2 with elbows 13 and 14, which are connected with theouter ends of a pair of alined suction pipes 15 and 16, united at theirinner ends by a forearmed coupling 17 with which communicates an inflowor suction pipe 18, communicating in practice with a suitable source ofwater supply, the coupling 17 being connected with the sleeve 7 by asuitable reinforcing member 19, whereby the parts of the pumpingmechanism above described are properly tied and braced together.

The sleeves l1 and 12 are respectively coupled to the elbows 13 and 14by sets of connections, each comprising a threaded coupling pipe ornipple 20 and coupling member or bushing 2l, the said bushings 2lprojecting into the sleeves ll and l2 and having their upper portionsprovided with guides 22 and formed to provide valve seats 23 for gravityclosing check valves 24 and 25, which are vertically movable on therespective guides. Each valve is adapted to open upwardly on the suctionstroke of the associated piston member, for the inflow of water to theassociated cylinder, on the reverse stroke of the piston member to closeby gravity against its seat to prevent the further influx of water andto allow the water drawn in to iiow through such piston member forydischarge through the outlet 8.

The double piston 26 operating within the cylinders comprises asubstantiallyl oblong rectangular plate, the body portion 27 of which isslidably mounted in the sleeve 7, and the end portions 2S and 29 ofwhich are slidably movable in the cylinders 5 and 6. The body portion 27is formed with an elongated longitudinal slot or opening 30 having upperand lower sets of rack teeth 3l and 82 which are adapted to meshalternately with the teeth 33 of a mutilated gear 34: fixed to the shaft9, which is rot-ated continuously from any suitable source of power.

In the rotation of the mutilated gear the piston is alternatelyreciprocated in opposite directions, as will be readily understood. Thegear, as shown, is preferably of the grooved or flanged type, tomaintain a constant engagement with the sides of the body 27 andprevent-the teeth from slipping laterally out from engagement with eachother.

The portions 28 and 29 of the piston plate or frame carry piston headsor members 35 and 36, which operate in the respective cylinders 5 and 6,each of said piston members .being of annular form to provide a waterpassage 37 and annularly grooved to receive suitable packing 38. Eachend 28.and 2 9 of the piston frame is slotted or bifurcated to provide apair of guide arms 29 terminating in threaded shanks 40 which passthrough openings in the associated piston head and are provided withclamping nuts 41, whereby said piston head is detachably secured inposition. The inner face of each piston head forms a valve seat for acheck valve 42, which comprises a plate movable in the space between theguide arms 39 and having notched portions 43 slidably engaging saidarms, whereby the Valve is guided and slidably mounted for inwardmovement to open the passage 37 and outward movement to close saidpassage. The body of the piston plate or frame is formed with openings44 in which slide stems 45 fixed to the valves, and associated withwhich are coiled springs 46 adapted under their expansive energy to holdthe valves normally closed.

From the foregoing description, it will be understood that in theoperation of the apparatus the piston will alternately draw -charges ofwater in through the pipes 15 and 16 and discharge the same in acontinuous stream through the pipe 8 lto the pipes of the irrigationapparatus. On the inward or suction stroke of each piston member, itwill be evident that the check valve controlling the passage thereinwill be held closed, while the check valve in the associated inflowconductor will open, whereby a charge of water will be drawn into thecylinder, that on the outward stroke of the piston the check valve inthe inflow conductor will be closed, while the check valve of the pistonwill open under presure to allow the water to iow through the passage inthe piston, which water is discharged on the ensuing inward or suctionstroke ofthe piston member. It will also be apparent that the pumpconstruction described provides for the ready assemblage, disassemblage,repairs and renewal of parts, while, owing to the simplicity of thepiston and valve mechanism, as well as the construction of thepiston perse, an even and regulated action of the pump is insured, the advantageof which in an irrigating apparatus will be manifest.

I claim l. Apump of the character described comprising a pair ofcommunicating cylinders having a common outlet and separate checkvalvedinlets, a piston comprising a body having bifurcated ends moving in therespective cylinders and provided with guide arms, piston memberssecured to the arms of the bifurcated ends of the piston body andmovable in the respective cylinders, each of said piston members havinga water passage, spring closed check valves controlling said passagesand slidably engaging the guide arms, and rack and pinion mechanism foralternately shifting said piston in opposite directions.

2. A pump of the character described comprising a pair of communicatingcylinders having a common outlet and separate checkvalved inlets, apiston comprising a body plate having a longitudinal slot with rackteeth at opposite sides thereof, and having bifurcated end portionsmovable in the respective cylinders and provided with guide armsterminating in stems, annular piston members secured to the stems andmovable in the respective cylinders, each of said piston members havinga water flow passage, springcontrolled check valves controlling thepassages in the piston members and having slotted portions slidablyengaging the guide arms, a rotary shaft, and a mutilated pinion actuatedby said shaft and adapted to alternately engage the toothed portions ofthe piston body to alternately shift the piston in opposite directions.

In testimony whereof I affix my signature in presence of two witnesses.

DOUGLAS D. MGEARLY.

Vitnesses:

W. L. MUGER, W. H. SMITH.

Copies of thil patent may be obtained for ive cents each, by addressingthe Commissioner of Ilatentl-v Washington, 1D. C.

